Squeezing giant spin states via geometric phase control in cavity-assisted Raman transitions

Keyu Xia

doi:10.1038/s41598-017-12486-1

Squeezing giant spin states via geometric phase control in cavity-assisted Raman transitions

Keyu Xia^*

^*Corresponding author for this work

ARC Centre of Excellence for Engineered Quantum Systems (EQuS)

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

51 Downloads (Pure)

Abstract

Squeezing ensemble of spins provides a way to surpass the standard quantum limit in quantum metrology and test the fundamental physics as well, and therefore attracts broad interest. Here we propose an experimentally accessible protocol to squeeze a giant ensemble of spins via the geometric phase control (GPC). Using the cavity-assisted Raman transition (CART) in a double Λ-type system, we realize an effective Dicke model. Under the condition of vanishing effective spin transition frequency, we find a particular evolution time where the cavity decouples from the spins and the spin ensemble is squeezed considerably. Our scheme combines the CART and the GPC, and has the potential to improve the sensitivity in quantum metrology with spins by about two orders.

Original language	English
Article number	12836
Pages (from-to)	1-7
Number of pages	7
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-12486-1
Publication status	Published - 9 Oct 2017

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Copyright The Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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Squeezing giant spin states via geometric phase control in cavity-assisted Raman transitions

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